Pressure in slide journal plane bearing by laminar unsteady oil flow

• Autorzy: Krasowski P.
• Języki publikacji: EN

Abstrakty

EN

This paper shows results of numerical solutions a modified Reynolds equation for laminar unsteady oil flow in slide journal plane bearing gap. It shows a preliminary analysis of pressure distribution change in the bearing by laminar, unsteady lubrication caused by velocity perturbations of oil flow in the longitudinal direction of a bearing. Described effect can be used as an example of modelling the bearing friction node operations in reciprocating movement during exploitation of engines and machines. Plane crossbar journal bearing occur in ship combustion engine as a crosshead bearing. During modelling crossbar bearing operations in combustion engines, bearing movement perturbations from engine vertical vibrations causes velocity flow perturbations of lubricating oil on the bearing race and on the bearing slider in the longitudinal direction. Engine forced vertical vibrations frequency and crankshaft forced torsional vibrations is determined by shaft rotational speed, engine cylinder number and by engine type. This solution example applies to isothermal bearing model with infinity length. Lubricating oil used in this model has Newtonian properties and dynamic viscosity in dependence on pressure. Results are presented in the dimensionless hydrodynamicpressure diagrams.

Słowa kluczowe

EN

journal plane bearing; lubrication; unsteady laminar oil flow; pressure distribution

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 3
• Strony: 297--303
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Krasowski P.

• Gdynia Maritime University Faculty of Marine Engineering Morska 83-87, 81-225 Gdynia, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Krasowski, P., Laminar, unsteady lubrication of slide journal bearing in magnetic field with dynamic viscosity depended on pressure, (in Polish), Tribologia 4/2002 (184), pp. 1189-1200, 2002.
• [2] Krasowski, P., Hydrodynamic pressure and capacity force in slide journal bearing with linear contracting gap. (in Polish) Technical University Press, ZN Budownictwo Okrętowe Nr 65, pp.105 – 112, Gdańsk, 2004.
• [3] Krasowski, P., Modelling of laminar unsteady and unsymmetrical flow in slide journal bearing with linear contracting gap, ( in Polish) Maritime University of Gdynia, Faculty of Marine Engeeniering,( non publish ).
• [4] Wierzcholski, K., Mathematical methods in hydrodynamic theory of lubrication, Technical University Press, Szczecin 1993.
• [5] Wierzcholski, K., Theory unconventional lubricant slide journal bearing, Technical University Press, Szczecin 1995.